[Nokinside]

Nothing. Xnm stopped having clear physical meaning when manufacturing moved to non-planar process. TSMC already has 2 nm nodes in research and sub-nm process research is next. sub-1 nm should be coming around 2025.

Best way to track progress is to follow MTr/mm² Millions of transistors per square millimeter (it's not exactly transistors but transistors and flip-flops with different weights) It tells us how many logical components tehre are per mm².